Very nice graphics! With only one level it could be consider a classic shareware game ;)

As mentioned before please make sure to provide proper attribution if you used assets that require it.

One level is good enough, but I think there should be one or two more actions available. I played 5 rounds and only saw 3-4 actions I believe. It also seems pretty hard to lose actually :D

First of all, I like the concept of a Slide the Spire card game. I would have liked, however, that there was progression and rewards, but otherwise it is a good base to expand it in the future.

Hey, I think you should mention that you use assets from a pack. It also is very similar to this tutorial.